Fluid-pressure-brake device.



W. V. TURNER.

FLUID PRESSURE BRAKE DEVICE.

AEPLIGATION FILED MAY 9, 1911.

1,078,018. Patented Nov. 11,1913.

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WITNESSES INVENTOR' Q/Za WM COLUMBIR PLANOGRAPH co..\\'AsHlNnToN. Ii. c

UNITED STATES PATENT OFFICE.

WALTER V. TURNER, 0F EDGEWOOD, PENNSYLVANIA, ASSIGNOR TO THE WESTING- HOUSE AIR BRAKE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

FLUID-PRESSURE-BRAKE DEVICE.

Specification of Letters Patent. I

Patented Nov. 1 1,1913.

To all whom it may concern a citizen of the United States, residing at Edgewood, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Fluid-Pressure- Brake Devices, of which the following is a specification.

This invention relates to fluid pressure brakes, and more particularly to a brake equipment for vehicles designed to run in either direction and provided with. two brake valves arranged at opposite ends of the vehicle, so that the brakes may be controlled from either end, as desired.

Where a brake valve is employed of the type having an equalizing piston and train pipe discharge valve-operated by said piston, the piston being subject to the opposing pressures of an equalizing reservoir and train pipe, when a reduction in train pipe pressure is made by one brake valve to effect an application of the brakes, fluid under pressure in the equalizing reservoir of the other brake valve is apt to leak pastthe equalizing piston to the train pipe and thereby reduce the pressure in the equalizing reservoir. This reduction in pressure will not have any eflec't while making a reduction in train pipe pressure, but upon increasing the train pipe pressure by manipulation of one brake valve to release the brakes, the higher train pipe pressure is then liable to move the equalizing piston of the other brake valve and thereby open the equalizing discharge valve to vent fluid from the train pipe. In this way considerable air is wasted and the-release of the brakes is also delayed. In order to obviate the above difliculty, it is customary to provide a cut out cock in the branch pipe connecting each brake valve with the train pipe, so that the train pipe may be cut off from the brake valve not in use. In service, it sometimes happens that the engineer .neglects to out out the brake valvein going to the opposite end of the vehicle, or neglects to out in the brake valve which he desires to use and consequently when he desires to apply the brakes he finds that he is unable to do so.

The principal object of my invention is to provide means for warning or indicating to the engineer whenever the brake valve Be it known that I, WALTER V. TURNER,

is out ofl from thev train pipe.

In the accompanying drawing, Figure 1 is a central sectional view of an engineers vbrake valve with my improvement applied "thereto, showing the cut-out cock in its open position; Fig. 2 a detailsectional view of the cut-out cock in its closed position; and Fig. 3 a diagrammatic view of a car air brake equipment, illustrating an application of myinvention.

The usual standard engineersbrake valve is ,shownin Fig. 1 of the drawing and comprisesa casing 1 containing rotary valve 2 and having a piston'chamber containing an equalizing piston 3 for operating an equalizing discharge valve 4. The chamber .5 on one side of piston 3 is subject to the pressure of an equalizing reservoir and chamber 6 on the opposite side of said piston is open to the train pipe. A passage 7 leading from the seat of the rotary valve 2 is connected with the train "pipe 8.

-As shown in Fig. 3, a brake valve may be provided at opposite ends of the vehicle and the train pipe 8 may be connected to a triple valve device 9 adapted to supply fluid from the auxiliary reservoir 10 to the brake cylinder 11 in the usual manner, upon a reduction in train pipe pressure.

According to my improvement, a cook 12 is inserted inthe train pipe branch pipe below the brake valve, said cock having a three-way port 13 adapted in one position of the cock to open communication from the brake valve to the train pipe and in another position, as shown in Fig. 2, to connect the atmosphere.

'On the end of the car from which the brakes are to be controlled, the handle of the cook 12 is turned to open position as shown in Fig. 1 and on the opposite end of the car, the handle is turned to closed position, as shown in Fig. 2. It will thus be seen that the brake valve on the end of the car interfere with the control of the brakes by manipulation of the other brake valve. When the engineer or motorman desires to operate the brakes from the opposite end of the car, the cook 12 is turned to closed position and the cook 12 at the opposite end of which is not occupied is out out and does not.

brake valve side of the train pipe with the escapes at the exhaust portot the rcockand.

the ear is turnecl to open: position? If the engineer should neglect to turn the cock to the cook 12 being inits closed position, air

thereby warns the engineer that the cock is in closed. position, so'that he willrthen turn the cock to its open position before starting.

Having now describeclmy invention,-what 1 I clann as new and desire to secure by Let-' ters Patent, is

1. In a fluid pressure brake,;the coinbination with artrain pipe and a brake valve for supplying ZLlIftO the train pipe, of a cock ,lnJthe tram pipe connectionto the brake valve having ports for establishing communication TEFOHl'lJllQfbliLkG valve to the train pipe 1110116 position and adapted to cut oil the trainv pipefrom thebrake valve in another position and connectthe-brake valve sicle of the train'pipe with thezatinosphere. 2', In a fluid pressure brake the combination with a trainpipe and abranehpipe, of

abra'lre valve for supplying" fluid through the branch p1pe*to the train pipe and pro- VldGCl with an equallzing discharge valve,

and a cock 'in said branch-pipe having an =a-brake valve having a running position for supplying fluid through the branch pipe to the-trainpipe and a cock in saidbranchp1pe havlng an open position forconnecting the brake valve to the train pipe and a closed position in whlchithe train pipe is cut toll and the brake valve side of the ztrain pipe is. connected to the atmosphere.

In testimony whereof I have hereunto set my hand.

WALTER. V. TURNER. liVitnesses: A-

-CLEMEN.TS, W. W. MARTIN.

(Gopies of thispatent may be obtained for five cents each, by addressing the Commissioner of 'IBatents,

a i i washinggton, D40. 

